Yelp surges on Einhorn stake but some on social media are skeptical

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YELP, Inc. (NYSE: YELP) Delayed: 21.88 +0.60 (2.82%)
Previous Close $21.28    52 Week High $43.36 
Open $21.75    52 Week Low $14.53 
Day High $22.16    P/E N/A 
Day Low $21.46    EPS $-0.15 
Volume 279,217